Mathematics - 30 August 2007

i've been working on this problem for the longest time and getting frustrated that i cant figure it out yet. will some kind person please help me?? thanks soo much!!

solve for V

when LV=P(1-(LV/2))

2007-08-30 17:21:40 · 4 answers · asked by suju 2

Having trouble with a couple problems:

A student scores 93,89,72,80 and 96 on the first 5 tests. What did she score on test 6 if her average is 83?

Better buy Appliances marks up its wholesale prices by 30% to determine retail prices. If a dishwasher retails for $599, what was the whole sale price of this item?

Find 5 consecutive integers such that their sum is 140.

Thanks

2007-08-30 17:21:23 · 4 answers · asked by Anonymous

Please show me how u solve this by using substitution
thanks.

2y = 3x - 2
4 = 2y - x

2007-08-30 17:19:28 · 6 answers · asked by vennysweetgirl21 3

besides removable

2007-08-30 17:12:03 · 4 answers · asked by ? 3

3y^2 + 36 = 24
solve for y

2007-08-30 17:11:49 · 5 answers · asked by henry c 1

Tallahassee was established as the capitol of Florida because it was between Pensacola and St. Augustine. The distance from Pensacola to Tallahassee is 190 miles. The distance from Tallahassee to St. Augustine can be represented as (5x + 5) miles. The distance from Pensacola to St. Augustine can be represented as (9x + 35) miles. Is Tallahassee the midpoint of Pensacola and St. Augustine? Show your work to support your conclusion.

2007-08-30 17:03:53 · 4 answers · asked by xlhollisterboi 1

How many different subsets can be chosen from the U.S. Senate?

2007-08-30 17:01:25 · 2 answers · asked by Sydney.♥ 2

B is the midpoint for segment A C..
AB=3x
AC=7x-5
What is the value of BC?

2007-08-30 16:58:53 · 3 answers · asked by xlhollisterboi 1

ok. there are 4 steps that we need to do. first define the variable, second is to write out the equation, the third is to write what the variable equals and the fourth is to write out the answer.
1. A clown weighs 60 lb more than a trapeze artist. The trapeze artist weighs two thirds as much as the clown. How much does each weigh? Choices for the weight of the trapeze artist: 110, 120, 125.

2. Elena has one and a half times as much money as Ramon. Together they have $225. How much money does each have? Choices for the number of boys: 191, 202, 207.

thanks for everyones helpl!!

2007-08-30 16:51:27 · 3 answers · asked by soccerman001 2

how do i work that out

2007-08-30 16:45:46 · 5 answers · asked by Anonymous

6 - x/4 = 4(x+1) /9

the answer is supposed to be 8

2007-08-30 16:44:48 · 5 answers · asked by sa 3

A wedding videographer uses a tripod to hold the video camera.


1.Through any two points, there is exactly one line.

2.A line contains at least two distinct points.

3.Through any three noncollinear points, there is exactly one plane.

4.A plane contains at least three noncollinear points.

2007-08-30 16:41:19 · 5 answers · asked by xlhollisterboi 1

2007-08-30 16:40:49 · 12 answers · asked by myles de1 1

This problem seems so easy but I can't seem to figure it out. I can see what the answer is from looking at a graph of the two functions but when I try to solve it without the graphs I get that x=0,2 pi.

I started by recognizing that tan x = sin x/cos x and then multiplied both sides by cos x/sin x (the reciprocal), which gave me cos x = 1 and cos x =1 at 0 and 2 pi. So I don't understand, without the graph, why the answer is x = 0, pi, 2 pi.

2007-08-30 16:39:47 · 2 answers · asked by mjs3382 1

Tell how many ways two of Beethoven's nine symphonies can be chosen for a concert program for each situation. (Order's not important)

a. The Ninth symphony can't be chosen.

Would be 8C2? (C stands for Combination)

b. The Second Symphony must be chosen.

Well, since it's a group of two, i decided to look at it in a logical way. If the Second Symphony is chosen, then there's only one more Symphony to pick to create the group of two. Therefore, the answer would be 8. However, I was wondering how I would do it if there was a larger group than 2 (a group which would be difficult to answer it logically).

c. The Ninth Symphony can't be paired with the third, sixth, or seventh.

First, I found the total # of the groups of two, and got 9C2. I'm not sure what to do next...

thank you in advance ^^

2007-08-30 16:33:19 · 2 answers · asked by lite_bluestar 2

2007-08-30 16:29:54 · 5 answers · asked by Anonymous

ABCD
+ AAA
________

I am lost. Can someone explain this to me??

2007-08-30 16:27:52 · 2 answers · asked by analicia_d82 4

the number of calories burned while doing an activity can be expressed by rm, where r is the rate of calories burned and m is the the number of minutes spent doing the activity...
problem:
a 120 pound student playing volleyball burns 2.7 calories per minute. if the student plays for 30 minutes, how many calories does the student burn?

2007-08-30 16:27:10 · 4 answers · asked by Anonymous

2007-08-30 16:09:07 · 16 answers · asked by apg 1

How can I solve the equation 1/2b + 4 = 1/8b + 88? Step by step explainations plz...and thank uuu

2007-08-30 16:08:25 · 8 answers · asked by Anonymous

...has at least one solution.
If false, please explain.
Thank you.

2007-08-30 16:04:52 · 4 answers · asked by Red 2

t=0.2s+10 and 4s+5t=35

its not a graph, you have to solve using substitution..

2007-08-30 16:04:50 · 6 answers · asked by Anonymous

What is -4.8? [List which of the following]
Rational
Irrational
Integer
Whole Number
Natural

please only answer this if you KNOW the answer
Thank you!

2007-08-30 16:02:43 · 6 answers · asked by Tallito 1

9:
(x3 + 4x2 - 2x + 5) - (3x3 - 3x2 + x - 2)
-2x3 + x2 - x + 3
-2x2 + 7x - 3x + 3
-2x3 + 7x2 - 3x + 7

10: Factor the following polynomials.
3x2 + 7x + 2
(3x + 3)(x + 2)
(3x + 1)(x + 2)
(x + 1)(x + 2)

11:
x4 + x2 - 6
(x2 - 2)(x2 + 3)
(x2 + 2)(x2 + 3)
(x2 - 2)(x2 + 2)

12:
64x2 - 9
(8x + 3)(x + 3)
(8x – 3)(8x + 3)
(4x – 3)(2x - 3)

13:
x3 - 1
(x – 1)(x2 + x + 1)
(x – 1)(x2 + 1)
(x – 1)(x2 + x - 1 )

14:
54x7 + 16x
x(3x2 + 2)(9x4 - 6x2 + 3)
2x(3x2 + 2)(9x4 - 6x2 + 4)
2x(3x2 + 1)(9x4 - 6x2 + 3)

15: Solve the following equations.
12m2 + 7m = -1
0, -5
-3/4, 3/2
-1/3, -1/4

16:
8(c3 - c) = c (6c + 1)
2, -5
0, -3/4, 3/2
3/4, 3/2

17: Simplify the following rational expressions:

(x2 - 1) · (x2 + 5x + 6) · (x2 - x - 20)
(x2 - 3x - 10) (x2 - 3x – 4) (x2 + 2x – 3)
(x + 4) / (x - 4)
(x + 4)(x - 4)
(x + 4) / (x + 4)

18:

(6x – 9) ÷ (6 – 13x + 6x2)
(5x +1) (15x2 - 7x – 2)
2
3
2x + 1
19:

(y – x) + (x + y)
(x2y) (xy2)
x2 + xy2
(2x2 + y2) / (x2y + 1)
( y2 + x2) / (x2y2)

2007-08-30 15:57:28 · 2 answers · asked by Anonymous

find the average speed for the given distance and time. show the unit analysis to check units,
problem:
in 5 seconds, an athlete runs 40 feet.



please and thank you....

2007-08-30 15:51:45 · 8 answers · asked by Anonymous

For a positive integer n, let Pn denote the product of the digits of n, and Sn denote the sum of the digits of n. The number of integers between 10 and 1000 for which Pn + Sn = n is

(a)81

(b)16

(c)18

(d)9

books soln :
--------------------
Let the number be xy. Then xy + x + y = 10x + y -> xy = 9x -> y = 9. The values that will satisfy the given conditions are: 19, 29, 39, 49, 59, 69, 79, 89, 99. Hence there are 9 such values.


the soln looks fine.

But see, book has taken only 2 digit number .

what about 3 and 4 digit and more digit numbers ?
it seems to me the soln given is not fair.

I need to understand why the more digit numbers are ignored.

2007-08-30 15:46:09 · 1 answers · asked by calculus 1

A study of Brand D washing machines that failed within three years (warranty period) was 28.7%. Of those that failed, 85.02% lasted over two years. What is the probability that a washer, which lasts at least two years, will still fail before the end of the warranty period?

2007-08-30 15:42:35 · 1 answers · asked by pumpkin 2

I need to know how to find the y-intercept when given two points. (4,3) (-4,-4)

I got that it was -1/2 but my sister got -1. Which one is correct, or are we both wrong?

2007-08-30 15:40:16 · 5 answers · asked by Sarah 4

Could someone help me with this. I have tried to get the correct answer and it is still wrong unless my paper has a typo. My answer is 381.86 cubic meters.
Find the volume of a sphere that has a diameter of 9 meters.
Please work out so I can understand......

2007-08-30 15:29:48 · 6 answers · asked by Tim M 1

I'm kinda stuck on how to do these if someone could work it a few out for me i'd appreciate it I don't remember the processes of this crap

7(a+1)-3a=5+4(2a-1)


0.5(2x+3/4)-1/3 (.1+x)=1

solve for variable 'v' ; h=vt-5t^2

'b2'; A= 1/2h(b1+b2)

2007-08-30 15:28:24 · 3 answers · asked by Anonymous